3641729 has 12 divisors (see below), whose sum is σ = 4562964. Its totient is φ = 2880864.

The previous prime is 3641707. The next prime is 3641731. The reversal of 3641729 is 9271463.

3641729 = T₇₄₂ + T₇₄₃ + ... + T₇₅₄.

It can be written as a sum of positive squares in 2 ways, for example, as 1270129 + 2371600 = 1127^2 + 1540^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3641729 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3641695 and 3641704.

It is not an unprimeable number, because it can be changed into a prime (3641629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2222 + ... + 3495.

It is an arithmetic number, because the mean of its divisors is an integer number (380247).

Almost surely, 2^3641729 is an apocalyptic number.

It is an amenable number.

3641729 is a deficient number, since it is larger than the sum of its proper divisors (921235).

3641729 is a wasteful number, since it uses less digits than its factorization.

3641729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744 (or 5737 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 3641729 is about 1908.3314701592. The cubic root of 3641729 is about 153.8517857746.

The spelling of 3641729 in words is "three million, six hundred forty-one thousand, seven hundred twenty-nine".